Car-roof.



D. W. HAWKSWORTH.

GAR ROOF.

APPLICATION FILED mnn11,191o.

1,089,553 Patented Mar. 10, 1914.

El. M J J W Wifvwsses 1}??? for tion of DAVID W; na-wxswonrrr, or DETROIT,

MICHIGAN, assrelvon To ncntrc'mns can,

ROOFING COMPANY, QFDETRLOIT, MICHIGAN, A coRPoRaTIoN or MICHIGENL .GAR-gROGF.

Specification'of Letters Patent.

Patented Mar. to, rare.

Application filed June 11, 1910.- Serial No. 566,383.

To all whom it may; concern.-

Be it known that I, DAVID W. HAWKS- winner, a vc1t1zen of the United States of America, residing at Detroit, in the county 1 the sections D so hav will be transmitted from one section to anof Wayne and State of Michigan, vented certain new and useful Improvements in Ca r,-Roofs, of which the following is aspecification, reference beinghad therein to the accompanying drawings.

The invention relates to car roof construction, and it is the particular object of the invention to obtain a construction in which the space occupied by the roof structure is reduced: to the minimum thereby increasing the capacity ofthe car.

It is the further object to obtain a strong light durable construction, and one which is thoroughly weather proof.

With these objects in view the invention consists in the construction as hereinafter set forth.

In the "lra \vings,Figure 1 is a cross see- Fig. 2 is a vertical longitudinal section on line w-ac. Fig. 3 is a similar view showing a modified construction.- Fig. 4 is an elevation showing the manner of splicing the purlins.

lliy improved roof belongs to that type in which the roof spans are formed solely by metal sheets, said sheets being supported on a frame composed of carlines and purlins. It is usual in the construction of the frame to arrange the carlines and the purlins in different planes, the one overlapping the other, but this necessitates a clearance equal to the combined thickness or depth of both members. I have reduced the thickness of the roof arranging both carlines and purlins within the vertical dimensions of the one, the construction being as follows: A. are the car-lines preferably formed of channel bars or other structural shape of beam, B are purlins formed of wood. The depth of thickness of these purlins is greater than that of the carliucs, and the upper faces of both carlines and purlins are arranged on the same plane so as to form a support for the roofing sheets.

To permit arrangement as above described the purlins are formed in sections comprising a lower section C extending unintere ruptedly the entire length of the car, and upper sections D which are arranged above the section C, and have their ends abutting against adjacent carlincs A. To increase the rigidity filler blocks E are placed within the channels of the cal-lines opposite the ends of that longitudinal stresses other. The sections C and ll) are united in an-ysuitable way as by wood screws F; the carhnes and purlins are also secured to each other by bolts G passing through the center of the intersection.

The roofing sheets H are provided With upstanding marginal flanges I, at their 015- posite edges whichare covered by a cap J' preferably of. U shape cross section. Clearance is provided for the flanges l to permit the sheets H independent movement, thereby avoidingrupturing the sheets by distortion of the roof frame. I have also provided aspacer between the flanges I oil adjacent sheets, this being preferably a Woodenstrip I extending from caves to the ridge of the car. This spacer is secured to the a t hi h my f i li d, fcarlines and purlins by the bolt G which passes therethrough and serves the further function of reinforcement of compression member of the carlines.

In the construction illustrated in Fig. 2 the carline A is in the form of a channel beam having its flanges at opposite sides and extending downward. In Fig. 3 a modified construction is shown in which the beam is provided with the laterally extend ing flanges K beyond the downwardly extending flanges L said lateral flange forming the support for the routing sheets. With both constructions the purlins are formed of a continuous lower section and a series of upper sections which abut against the earlines and have their upper faces fiush with the upper face of the carlines.

To make the reinforcement of the carline by the spacer strip I efiectiv'e, 1 preferably, provide a ridge cap M with depending lugs or flanges N which form abutments for the end of the spacer. This will cause the compression stresses developed in the strip 1' to be transmitted from eave to cave, thereby strengthening the metallic carline.

The purlin may if desired, be formed of either sections spliced to each other. That is. in place of using a lower section G which extends the entire length of the car, this section may be abutted against a similar section at a point intermediate the carlines. As shown, in Fig. 4;,the sections C and C abut against each other and are secured by the section D 4 carlines.

which extends between adjacent The overlapping of these sections will thus form a splice which Will make the purlins as efiective as if composed of a single What I claim as my invention is:

1. In a car roof, the combination with carlines, of a purlin of greater depth having its upper face flush with the upper faces of the carlines and having a lower portion extending uninterruptedly beneath said carlines, and roofing sheets supported on the flush faces of said carlines and purlins.

2. In a car roof, the combination of metallic carlines and wooden purlins arranged with their upper faces on the same plane, roofing sheets supported on said carlines, and

' purlins having upturned flanges and caps above said carlines covering said flanges.

3-. In a car roof, the combination with metallic carlines, of wooden purlins having their upper faces flush with the upper faces of said carlines, roofing sheets supported on said carlines and purlins, and wooden strips extending longitudinally on said carlines forming spacers for, said sheets and reinforcements for said carlines.

4. Ina car roof, the combination with metallic carlines, of wooden purlins having copiel at this patent may be obtained for five cents each by addressing Washington, D. 0.

their upper faces flush with the upper faces roof sheets supported on of said carlines, said carlines and purlms, and wooden strips extendin longitudinally of each carline formlng a spacer for said sheets and a remforcement for saidcarhne,v and a ridge cap having abutment thereon for said spacer.

5. In a car roof, the comblnation with metallic carlines formed of channel bars, of

purlins arranged with their upper faces in the same plane, roofing sheets supported on the flush faces of said carlines and purlins, wooden strips extending longitudinally on said carlines forming spacers for said sheets and reinforcements for said carlines, and

filler blocks within the channels of the carthe Commissioner 6: 2mm, 

